BOUCHET, Fedosov & Puillandre & Herrmann & Kantor & Oliverio & Dgebuadze & Modica & Bouchet, 2018

Fedosov, Alexander, Puillandre, Nicolas, Herrmann, Manfred, Kantor, Yuri, Oliverio, Marco, Dgebuadze, Polina, Modica, Maria Vittoria & Bouchet, Philippe, 2018, The collapse of Mitra: molecular systematics and morphology of the Mitridae (Gastropoda: Neogastropoda), Zoological Journal of the Linnean Society 183, pp. 253-337 : 321-322

KANTOR & BOUCHET GEN. NOV.

( FIGS 37, 38A–C)

Type species: Mitra peculiaris Reeve, 1845 ; OD, herein.

Diagnosis: Shell small (7–20 mm), elongate-fusiform, with characteristic pattern formed by light adapical portions of teleoconch whorls, gradually transiting to yellow or orange peripheries. Protoconch narrowly conical or cyrtoconoid, of three to almost five, evenly convex, smooth and glossy whorls. Suture distinct, slightly impressed. Early spire whorls with flattened or slightly convex outlines, later gently convex or distinctly carinated at the suture. Except for subsutural carina, sculpture limited to very weak spiral grooves on shell base and siphonal canal, thus the shell appears smooth. Siphonal canal tapering, siphonal notch shallow or indistinct. Aperture elongate, rather narrow; outer lip smooth, convex. Inner lip with four to five fine oblique columellar folds. Rachidian narrow, bearing either six cusps of comparable size, or four cusps with two medial notably stronger than two laterals. Laterals wide, bearing multiple cusps, of which second and third from rachidian are strongest.

Distribution: Indo-Pacific, upper subtidal depths, reef crevices and coral rubble.

Species included: Carinomitra peculiaris (Reeve, 1845) 1 comb. nov., C. saltata (Pease, 1865) 2 comb. nov., C. typha (Reeve, 1845) 1 comb. nov.

Etymology: The name Carinomitra refers to the presence of the distinct keel (Latin carina) in at least two species of this newly recognized lineage, including the type species C. peculiaris .

Remarks: The genus Carinomitra is conchologically distinctive due to the carinated or adapically inflated adult whorls and the characteristic colour pattern. The radulae of the three studied species exhibit notable disparity. In C. peculiaris , the rachidian bears multiple cusps with a central unpaired cusp; conversely, in C. saltata and C. typha , the unpaired central cusp of the rachidian is absent, and the paired central cusps greatly exceed the paired lateral cusps. This variation in radula morphology parallels that observed in Imbricaria and Cancilla (see discussion below).

GENUS CONDYLOMITRA FEDOSOV, HERRMANN ,